25231302523 has 4 divisors (see below), whose sum is σ = 28835774320. Its totient is φ = 21626830728.

The previous prime is 25231302469. The next prime is 25231302533. The reversal of 25231302523 is 32520313252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25231302523 - 2²⁹ = 24694431611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25231302491 and 25231302500.

It is not an unprimeable number, because it can be changed into a prime (25231302533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802235888 + ... + 1802235901.

It is an arithmetic number, because the mean of its divisors is an integer number (7208943580).

Almost surely, 2^25231302523 is an apocalyptic number.

25231302523 is a deficient number, since it is larger than the sum of its proper divisors (3604471797).

25231302523 is an equidigital number, since it uses as much as digits as its factorization.

25231302523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604471796.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 25231302523 its reverse (32520313252), we get a palindrome (57751615775).

The spelling of 25231302523 in words is "twenty-five billion, two hundred thirty-one million, three hundred two thousand, five hundred twenty-three".